Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus strumosus
FAMILY
Asteraceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Roughleaf Sunflower at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus strumosus
FAMILY
Asteraceae
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21 (2006)
Helianthus strumosus
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-019:
Helianthus strumosus FAMILY Asteraceae
INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus montanus
INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus saxicolus
INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus strumosus
COMMON NAME:
Roughleaf Sunflower, Paleleaf Woodland Sunflower, Paleleaf Sunflower
To see larger pictures, click or hover over the thumbnails.
)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_hest_001_lvd
)
JK Marlow jkm210824_2973
August Greenville County SC
Tall Pines Wildlife Management Area
Differs from H. tuberosus in its glabrous/glabrate stems and lack of tubers, per Flora of North America.
)
JK Marlow jkm190905_1352
September Greenville County SC
Tall Pines Wildlife Management Area
Plants rhizomatous, but not producing tubers, per Weakley's Flora (2018).
)
JK Marlow jkm190905_1354
September Greenville County SC
Tall Pines Wildlife Management Area
Heads with 8-15 yellow ray florets encircling tubular yellow disk florets, per Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019).
)
JK Marlow jkm190905_1355
September Greenville County SC
Tall Pines Wildlife Management Area
Flower heads mostly solitary at the ends of branches, per Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019).
)
JK Marlow jkm190905_1357
September Greenville County SC
Tall Pines Wildlife Management Area
Overlapping, spreading, narrow and pointed bracts with hairy margins, per Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019).
)
JK Marlow jkm190905_1359
September Greenville County SC
Tall Pines Wildlife Management Area
Leaves thick, lanceolate, 8-14cm long, acuminate, serrate, scabrous above, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow jkm190905_1360
September Greenville County SC
Tall Pines Wildlife Management Area
)
Richard and Teresa Ware rtw_h_strumosus_2
September
Rays usually 10+ in larger heads; anther appendages dark or reddish-brown, per Weakley's Flora (2018).
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus strumosus
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus strumosus
FAMILY
Asteraceae
SYNONYMOUS WITH
Flora of North America north of Mexico, vol. 19-20-21
Helianthus strumosus
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-019:
Helianthus strumosus
FAMILY
Asteraceae
INCLUDING
Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus montanus
INCLUDING
Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus saxicolus
INCLUDING
Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus strumosus
653
Forb
Perennial
Habitat: woodlands and roadsides, per Weakley's Flora
Native to the Carolinas & Georgia
Common (rare in Coastal Plain)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Opposite, sometimes alternate
RHIZOMES? STOLONS?
Rhizomatous, but not producing tubers
FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Inferior ovary
Disc flowers bisexual & fertile/ Ray flowers pistillate but sterile
FRUIT:
Summer/Fall
Brown
Achene
TO LEARN MORE about this plant, look it up in a good book!
- All About South Carolina Wildflowers (Midgley, 1999) p172
- Newcomb's Wildflower Guide (Newcomb, 1977) p388
- Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019) p299
- Wildflowers of the Eastern United States (Duncan & Duncan, 1999) p123
- Field Guide to the Wildflowers of Georgia (Chafin, 2016) p090
- Wildflowers of Tennessee (Carman, 2005) p302
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005) p351
- Wildflowers & Plant Communities of the Southern Appalachian Mountains and Piedmont (Spira, 2011) p382
- Wildflowers of the Southern Mountains (Smith, 1998) p192
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